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Systems and methods for low temperature heat sources with relatively high temperature cooling media

a technology of cooling media and low temperature heat source, which is applied in the direction of steam engine plants, machines/engines, mechanical equipment, etc., can solve the problems of reducing the efficiency of the system described in the prior art and the possible range of such recuperative boiling-condensation, so as to improve the overall energy extraction efficiency of the method, the effect of increasing the solution stream

Inactive Publication Date: 2014-09-16
KALINA POWER LTD
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  • Abstract
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  • Application Information

AI Technical Summary

Benefits of technology

The patent describes methods for improving the efficiency of energy extraction by vaporizing a higher pressure rich solution stream and separating it into a rich vapor stream and a lean liquid stream. The rich vapor stream is then adjusted by adding a portion of the lean liquid stream to form a richer solution stream, which increases the overall energy extraction efficiency. The methods also involve fully vaporizing and slightly superheating the richer solution stream, converting a portion of the heat associated with the vaporized stream into a useable form of energy, and combining a pressure adjusted remainder of the lean liquid stream into a spent rich solution stream.

Problems solved by technology

But in a case where the initial temperature of the heat source used is moderate or low, the range of temperatures of the heat source is narrow, and therefore, the possible range of such recuperative boiling-condensation is significantly reduced and the efficiency of the system described in the prior art diminishes.

Method used

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  • Systems and methods for low temperature heat sources with relatively high temperature cooling media
  • Systems and methods for low temperature heat sources with relatively high temperature cooling media

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embodiment

The SG-9c Embodiment

[0023]Referring now to FIG. 1, the system SG-9c operates as follows. A fully condensed rich solution stream S1 having parameters as at a point 1 is pumped to a desired higher pressure by a feed pump P1 to form a higher pressure rich solution stream S2 having parameters as at a point 2, which corresponds to a state of subcooled liquid. The rich solution stream S2 includes a higher concentration of the lower boiling component. Thereafter, the stream S2 passes a preheater or second heat exchange unit HE2, where it is heated in counterflow with a heat source fluid stream S513 having parameters as at a point 513 to form a spent heat source stream S502 having parameters as at a point 502 and a preheated higher pressure rich solution stream S3 having parameters as at a point 3, which corresponds to a state of saturated liquid.

[0024]The stream S3 is then divided into two substreams S4 and S5, having parameters as at points 4 and 5. The stream S5 then passes through a rec...

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Abstract

Methods and systems for implementing a thermodynamic cycle using heat source streams having initial temperatures between about 200° F. and about 500° F. and coolant stream having relatively high temperatures greater than or equal to about 80° F., where the methods and systems have overall energy extraction efficiencies that are at least 40% higher than a corresponding Rankine cycle.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]Embodiments of the present invention relate to systems designed for utilizing of heat source streams having an initial temperature between about 200° F. and about 500° F., such as geothermal heat sources and other heat sources with a similar temperature range.[0003]More particularly, embodiments of the present invention relate to systems designed for utilizing of heat sources streams having an initial temperatures between about 200° F. and about 500° F., such as geothermal heat sources and other heat sources with similar a temperature range, where the system includes a two staged condensation subsystem. The system is specifically designed for use in applications, where the temperatures of cooling water or air are relatively high, e.g., 80° F. or higher. This makes the system well suited for use in geothermal applications in tropical and subtropical climates.[0004]2. Description of the Related Art[0005]In U.S. Pat. No. 4...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): F01K25/06
CPCF01K25/06
Inventor KALINA, ALEXANDER, I.
Owner KALINA POWER LTD